What if it wasn't God that introduced pediatric bone cancer into the world? Some people believe that much of the world's evil is from Satan. Would it make a difference if pediatric bone cancer and other such evils were caused by Satan in an effort to further separate us from God? Should God have prevented Satan from that? Should God prevent people from doing evil too? That is, should God take away our choice to do whatever we want, and instead limit us to only doing good? (If so, I sure hope He doesn't take away whiskey and cigars. LOL)
There shouldn't be a world in the first place. The point of this world is that Man lives his life by God's rules, and if we're good and do everything right, we get to go live in Heaven forever with him.
This "life on Earth" step was never necessary for God. God could have (being omnipotent) created us in Heaven without the capacity or desire for Sin. God did not
need to give us that ability, God
chose to give us that ability, tempted Adam beyond his simpleton's ability to overcome, and damned billions and billions and billions of people to life on a sinful Earth as a result of one man's choice.
Think about that. Everyone in history, ever, has to suffer because one man made a bad choice.
Would everyone, having been given Adam's start in Eden, have made exactly the same choice as Adam? Of those billions and billions of people, how many wouldn't have? 100 million? 1 million? 10,000? However many it is, every one of those potentially innocent people has been condemned to suffer on Earth by God because of some crackpot rule made in the depths of time.